<?php
/**
 * Zend Framework
 *
 * LICENSE
 *
 * This source file is subject to the new BSD license that is bundled
 * with this package in the file LICENSE.txt.
 * It is also available through the world-wide-web at this URL:
 * http://framework.zend.com/license/new-bsd
 * If you did not receive a copy of the license and are unable to
 * obtain it through the world-wide-web, please send an email
 * to license@zend.com so we can send you a copy immediately.
 *
 * @category  Zend
 * @package   Zend_Validate
 * @copyright Copyright (c) 2005-2009 Zend Technologies USA Inc. (http://www.zend.com)
 * @license   http://framework.zend.com/license/new-bsd     New BSD License
 * @version   $Id: ExcludeMimeType.php 18148 2009-09-16 19:27:43Z thomas $
 */

/**
 * @see Zend_Validate_File_MimeType
 */
require_once 'Zend/Validate/File/MimeType.php';

/**
 * Validator for the mime type of a file
 *
 * @category  Zend
 * @package   Zend_Validate
 * @copyright Copyright (c) 2005-2009 Zend Technologies USA Inc. (http://www.zend.com)
 * @license   http://framework.zend.com/license/new-bsd     New BSD License
 */
class Zend_Validate_File_ExcludeMimeType extends Zend_Validate_File_MimeType
{
	const FALSE_TYPE   = 'fileExcludeMimeTypeFalse';
	const NOT_DETECTED = 'fileExcludeMimeTypeNotDetected';
	const NOT_READABLE = 'fileExcludeMimeTypeNotReadable';

	/**
	 * Defined by Zend_Validate_Interface
	 *
	 * Returns true if the mimetype of the file does not matche the given ones. Also parts
	 * of mimetypes can be checked. If you give for example "image" all image
	 * mime types will not be accepted like "image/gif", "image/jpeg" and so on.
	 *
	 * @param  string $value Real file to check for mimetype
	 * @param  array  $file  File data from Zend_File_Transfer
	 * @return boolean
	 */
	public function isValid($value, $file = null)
	{
		if ($file === null) {
			$file = array(
                'type' => null,
                'name' => $value
			);
		}

		// Is file readable ?
		require_once 'Zend/Loader.php';
		if (!Zend_Loader::isReadable($value)) {
			return $this->_throw($file, self::NOT_READABLE);
		}

		$mimefile = $this->getMagicFile();
		if (class_exists('finfo', false)) {
			$const = defined('FILEINFO_MIME_TYPE') ? FILEINFO_MIME_TYPE : FILEINFO_MIME;
			if (!empty($mimefile)) {
				$mime = new finfo($const, $mimefile);
			} else {
				$mime = new finfo($const);
			}

			if ($mime !== false) {
				$this->_type = $mime->file($value);
			}
			unset($mime);
		}

		if (empty($this->_type)) {
			if (function_exists('mime_content_type') && ini_get('mime_magic.magicfile')) {
				$this->_type = mime_content_type($value);
			} elseif ($this->_headerCheck) {
				$this->_type = $file['type'];
			}
		}

		if (empty($this->_type)) {
			return $this->_throw($file, self::NOT_DETECTED);
		}

		$mimetype = $this->getMimeType(true);
		if (in_array($this->_type, $mimetype)) {
			return $this->_throw($file, self::FALSE_TYPE);
		}

		$types = explode('/', $this->_type);
		$types = array_merge($types, explode('-', $this->_type));
		foreach($mimetype as $mime) {
			if (in_array($mime, $types)) {
				return $this->_throw($file, self::FALSE_TYPE);
			}
		}

		return true;
	}
}
